        setContentPane(mainPanel);

        // 浣跨敤 FlatLaf 涓婚锛岃缃负浜壊涓婚澧炲己瑙嗚鏁堟灉
        try {
            UIManager.setLookAndFeel("com.formdev.flatlaf.FlatLightLaf");
        } catch (Exception ex) {
            ex.printStackTrace();
        }

        // 璁剧疆绐楀彛涓烘棤鑷畾涔夌獥鍙ｏ紙蹇呴』鍦ㄦ樉绀虹獥鍙ｅ墠璋冪敤锛
        setUndecorated(true);
        
        // 娓╁害閫忔槑搴︼紝浣跨晫闈㈁劘娣诲姞鐧诲綍鎰熻
        setOpacity(0.95f);